Re: mk_wcwidth

[seer26@xxxxxxxxxxxx]

>You do realize that people in CJK locales expect some characters to be
>double width that people in European/American locales expect to be single
>width.

Doublewidth roman letters are in the unicode range FF00-FFFE, so
when converting from a legacy encoding that assumes the ascii
ranges are all doublewidth, you map to (ascii+FEE0). With
unicode you can even mix double and singlewidth "ascii" in a
single document; many of the roman letters became "kanji"
when in doublewidth form (for example doublewidth capital
letter H can mean pornography) and have a different meaning
than their single-width brethren.

So a unicode char-cell width function should function identically
for all locales.

(I dont know of any unicode support for fullwidth greek or cyrillic,
 but should such a thing be needed, there is room north of the BMP)


> > i was imagining perhaps the difference between O(2 log n) and O(log n)
> > would still be worthwhile :)

> O(2 log n) = O(log n). 

yes, and O(1 billion years + log n) == O(log n) too :)
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